package com.ry.gram;

import io.netty.channel.Channel;

public abstract class A {

    abstract B newB();

    protected void doThing() {
        System.out.println("A---------------");
    }

    public class B {
        public void regedit() {
            System.out.println("B regedit.......");
            doThing();
        }
    }

}
